网站HTML静态化解决方案

最近在做一个项目，其中一部分的访问频率较高但内容变动较小。所以使用网站HTML静态化方案来优化访问速度

当一个Servlet资源请求到达WEB服务器之后我们会填充指定的JSP页面来响应请求:

HTTP请求---Web服务器---Servlet--业务逻辑处理--访问数据--填充JSP--响应请求

HTML静态化之后:

HTTP请求---Web服务器---Servlet--HTML--响应请求

嘿嘿，是不是很爽？省去了业务逻辑处理和数据抓取直接响应。

Servlet:

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    if(request.getParameter("chapterId") != null){
        String chapterFileName = "bookChapterRead_"+request.getParameter("chapterId")+".html";
        String chapterFilePath = getServletContext().getRealPath("/") + chapterFileName;
        File chapterFile = new File(chapterFilePath);
        if(chapterFile.exists()){response.sendRedirect(chapterFileName);return;}//如果有这个文件就告诉浏览器转向
        INovelChapterBiz novelChapterBiz = new NovelChapterBizImpl();
        NovelChapter novelChapter = novelChapterBiz.searchNovelChapterById(Integer.parseInt(request.getParameter("chapterId")));//章节信息
        int lastPageId = novelChapterBiz.searchLastCHapterId(novelChapter.getNovelId().getId(), novelChapter.getId());
        int nextPageId = novelChapterBiz.searchNextChapterId(novelChapter.getNovelId().getId(), novelChapter.getId());
        request.setAttribute("novelChapter", novelChapter);
        request.setAttribute("lastPageId", lastPageId);
        request.setAttribute("nextPageId", nextPageId);
        new CreateStaticHTMLPage().createStaticHTMLPage(request, response, getServletContext(),
                chapterFileName, chapterFilePath, "/bookRead.jsp");
    }
}

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if(request.getParameter("chapterId") != null){ String chapterFileName = "bookChapterRead_"+request.getParameter("chapterId")+".html"; String chapterFilePath = getServletContext().getRealPath("/") + chapterFileName; File chapterFile = new File(chapterFilePath); if(chapterFile.exists()){response.sendRedirect(chapterFileName);return;}//如果有这个文件就告诉浏览器转向 INovelChapterBiz novelChapterBiz = new NovelChapterBizImpl(); NovelChapter novelChapter = novelChapterBiz.searchNovelChapterById(Integer.parseInt(request.getParameter("chapterId")));//章节信息 int lastPageId = novelChapterBiz.searchLastCHapterId(novelChapter.getNovelId().getId(), novelChapter.getId()); int nextPageId = novelChapterBiz.searchNextChapterId(novelChapter.getNovelId().getId(), novelChapter.getId()); request.setAttribute("novelChapter", novelChapter); request.setAttribute("lastPageId", lastPageId); request.setAttribute("nextPageId", nextPageId); new CreateStaticHTMLPage().createStaticHTMLPage(request, response, getServletContext(), chapterFileName, chapterFilePath, "/bookRead.jsp"); } } 

 

生成HTML静态页面的类:

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package com.jb.y2t034.thefifth.web.servlet;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
/**
 * 创建HTML静态页面
 * 功能：创建HTML静态页面
 * 时间：2009年1011日
 * 地点：home
 * @author mavk
 *
 */
public class CreateStaticHTMLPage {
    /**
     * 生成静态HTML页面的方法
     * @param request 请求对象
     * @param response 响应对象
     * @param servletContext Servlet上下文
     * @param fileName 文件名称
     * @param fileFullPath 文件完整路径
     * @param jspPath 需要生成静态文件的JSP路径(相对即可)
     * @throws IOException
     * @throws ServletException
     */
    public void createStaticHTMLPage(HttpServletRequest request, HttpServletResponse response,ServletContext servletContext,String fileName,String fileFullPath,String jspPath) throws ServletException, IOException{
        response.setContentType("text/html;charset=gb2312");//设置HTML结果流编码(即HTML文件编码)
        RequestDispatcher rd = servletContext.getRequestDispatcher(jspPath);//得到JSP资源
        final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();//用于从ServletOutputStream中接收资源
        final ServletOutputStream servletOuputStream = new ServletOutputStream(){//用于从HttpServletResponse中接收资源
            public void write(byte[] b, int off,int len){
                byteArrayOutputStream.write(b, off, len);
            }
            public void write(int b){
                byteArrayOutputStream.write(b);
            }
        };
        final PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(byteArrayOutputStream));//把转换字节流转换成字符流
        HttpServletResponse httpServletResponse = new HttpServletResponseWrapper(response){//用于从response获取结果流资源(重写了两个方法)
            public ServletOutputStream getOutputStream(){
                return servletOuputStream;
            }
            public PrintWriter getWriter(){
                return printWriter;
            }
        };
        rd.include(request, httpServletResponse);//发送结果流
        printWriter.flush();//刷新缓冲区，把缓冲区的数据输出
        FileOutputStream fileOutputStream = new FileOutputStream(fileFullPath);
        byteArrayOutputStream.writeTo(fileOutputStream);//把byteArrayOuputStream中的资源全部写入到fileOuputStream中
        fileOutputStream.close();//关闭输出流，并释放相关资源
        response.sendRedirect(fileName);//发送指定文件流到客户端
    }
}

引用：http://blog.csdn.net/zjwilove4/archive/2009/10/18/4695518.aspx